YELEOW DRY AD 
Dryas drummondi Richardson 
As yellow dryad is usually seen by mountain visitors, its mats of 
crinkled leaves ate surmounted by fluffy seed heads, for the flowets 
open early and last for only a brief season. The plant grows most pro- 
fusely in gravelly glacial stream bottoms, in limestone soil. Hete it 
abounds until overwhelmed in midsummer by the high waters of 
melting glacial ice, surviving only on portions of the stream banks 
left undisturbed by the rushing water. The pale yellow flower always 
turns its face downward, and does not open fully to the sunlight. The 
dryads belong to the Rose Family. 
This species is found often at high elevations, from Quebec to 
Montana, British Columbia, and Alaska. 
The specimen sketched was ptocured in the Ice River Valley, 
twenty-five miles by trail from Leanchoil Station on the Canadian 
Pacific Railroad, British Columbia, at an altitude of 3,500 feet. 
PLATE 364 
